export {};
type ObjType = {
  name: string;
  age: number;
  gender?: number;
};

let obj: ObjType = {
  name: 'zs',
  age: 20,
  gender: 1,
};
// obj.name
obj.name;

let obj1: ObjType = {
  name: 'li',
  age: 22,
};
